Equine Herpes Myeloencephalopathy (EHM) Updates

NO CURRENT EHM CASES UNDER QUARANTINE

EHM Incident in San Diego County-- Quarantine Released

March 16, 2017: The quarantine at the San Diego County premises has been released as the Equine Herpesvirus Myeloencephalopathy (EHM) case has met the negative test requirements for quarantine release.  There are no EHM cases under quarantine in California at this time.

March 9, 2017: The confirmed quarantined Equine Herpesvirus Myeloencephalopathy case in San Diego County is recovering and is awaiting required testing for quarantine release. No additional cases have been confirmed  at this premises. CDFA continues to monitor the situation.

March 1, 2017: The confirmed quarantined Equine Herpesvirus Myeloencephalopathy case in San Diego County is recovering. CDFA continues to monitor the situation.

February 16, 2017: The confirmed quarantined Equine Herpesvirus Myeloencephalopathy case in San Diego County is recovering. CDFA continues to monitor the situation.

CDFA is aware of Equine Herpesvirus-1(EHV) circulating in horses previously stabled in Tent 21 of the HITS Thermal Showgrounds. However, CDFA only has regulatory authority (ie quarantine issuance authority) over EHV-1 confirmed cases with neurologic signs (Equine Herpesvirus Myeloencephalopathy.) CDFA recommends exhibitors at the HITS Thermal Show follow enhanced biosecurity protocols.

 

February 13, 2017: A 10 year-old Warmblood gelding in San Diego County displaying neurologic signs of urine dribbling and hind limb ataxia was confirmed positive for Equine Herpesvirus -1 by the California Animal Health and Food Safety (CAHFS) Laboratory, the state’s regulatory laboratory. Based on the clinical signs and positive laboratory test, this horse meets the case definition for Equine Herpesvirus Myeloencephalopathy, a condition which requires regulatory action. The neurologic signs were first noted on Tuesday February 7, 2017. The positive horse was stabled in tent 21 at the HITS Show in Thermal, CA from January 21, 2017 to February 5, 2017.  The EHM horse and one additional exposed horse have been quarantined at their home premises in San Diego County. CDFA has been in contact with HITS show management and veterinarians to ensure enhanced biosecurity measures are taken on the premises; including cleaning and disinfecting the stabling area. CDFA recommends any exposed horses be observed for clinical signs and have temperatures taken twice daily.  CDFA will continue to monitor the situation.